Müller HS, Farhoomand J, Cohen EA, Brupbacher-Gatehouse B, Schäfer M, Bauder A, Winnewisser G
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, Cologne, 50937, Germany
J Mol Spectrosc. 2000 May;201(1):1-8. doi: 10.1006/jmsp.2000.8072.
Precise frequencies for the 1(11)-2(02) transition of (33)SO(2) and SO(17)O in natural isotopic abundance have been obtained near 12 GHz by microwave Fourier transform spectroscopy in order to yield improved hyperfine constants. Nuclear spin-rotation coupling constants have been determined experimentally for (33)SO(2) for the first time. The spin-rotation constants have been used to derive nuclear magnetic shielding parameters. These parameters are compared with values for the isoelectronic O(3) molecule. The transition mentioned above was also measured for (32)SO(2), (34)SO(2), SO(18)O, and vibrationally excited (v(2) = 1) (32)SO(2). For (33)SO(2), some transitions with large hyperfine splitting were also recorded in the millimeter-wave region. Continuing our investigations of the rotational spectra of SO(2) in the submillimeter region, several transitions of SO(17)O have been recorded with the Cologne terahertz spectrometer between 540 and 840 GHz with J and K(a) up to 63 and 16, respectively. Transitions with high K(a), up to 28, have been recorded with the JPL laser sideband spectrometer between 1.8 and 3.2 THz. Copyright 2000 Academic Press.
为了得到改进的超精细常数，利用微波傅里叶变换光谱在12 GHz附近获得了天然同位素丰度下(33)SO₂和SO¹⁷O的1(¹¹)-2(⁰²)跃迁的精确频率。首次通过实验确定了(33)SO₂的核自旋-旋转耦合常数。利用自旋-旋转常数推导出核磁屏蔽参数。将这些参数与等电子体O₃分子的值进行了比较。还测量了(32)SO₂、(34)SO₂、SO¹⁸O以及振动激发态(v₂ = 1)(32)SO₂的上述跃迁。对于(33)SO₂，在毫米波区域还记录了一些具有大超精细分裂的跃迁。继续我们在亚毫米波区域对SO₂转动光谱的研究，用科隆太赫兹光谱仪在540至840 GHz之间记录了SO¹⁷O的几个跃迁，J和Kₐ分别高达63和16。用喷气推进实验室的激光边带光谱仪在1.8至3.2 THz之间记录了Kₐ高达28的跃迁。版权所有2000年学术出版社。
